IMAGE ENCRYPTION BY USING VARIABLE LENGTH KEY: A STATE OF THE ART SURVEY

Abstract

Centered on a modified tent map, we propose a new image encryption algorithm with a variable length running key. This modified tent map will produce a uniform pseudo-random number sequence for distribution. In the proposed image encryption, we use the variable length running key strategy that extends key value space, the one-time running key strategy that is immune to known/chosen plaintext attack, the cypher disruption strategy that minimizes the dynamic degradation of digital chaos. Simulations have been carried out and the findings show our system's good survival potential. In every area of human life and development, the advancement of digital and multimedia techniques makes imaging devices deeply involved. In the field of life, to catch beautiful moments, people use handheld terminals such as mobile phones, personal digital assistants (PDAs), and other portable devices. People use ultrasonic, computed tomography (CT), magnetic resonance imaging, and positron emission tomography imaging in the field of medical imaging to verify the health of people.